x²-9x+20=0;
a=1
b=-9
c=20
D=b²-4ac
D=(-9)²-4•1•20=81-80=1
х1,2=-b±√D/2a
x1=9+√1/2•1=10/2=5
x2=9-√1/2•1=8/2=4
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
x²-9x+20=0;
a=1
b=-9
c=20
D=b²-4ac
D=(-9)²-4•1•20=81-80=1
х1,2=-b±√D/2a
x1=9+√1/2•1=10/2=5
x2=9-√1/2•1=8/2=4
х1+х2=9
х1•х2=20
х1=5
х2=4